7139673728 has 48 divisors (see below), whose sum is σ = 15634204530. Its totient is φ = 3245299200.

The previous prime is 7139673613. The next prime is 7139673769. The reversal of 7139673728 is 8273769317.

It can be written as a sum of positive squares in only one way, i.e., 6857164864 + 282508864 = 82808^2 + 16808^2 .

It is a super-3 number, since 3×7139673728³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7139673728.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215003 + ... + 245978.

Almost surely, 2^7139673728 is an apocalyptic number.

It is an amenable number.

7139673728 is an abundant number, since it is smaller than the sum of its proper divisors (8494530802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7139673728 is a wasteful number, since it uses less digits than its factorization.

7139673728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461017 (or 460994 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 53.

The square root of 7139673728 is about 84496.5900377051. The cubic root of 7139673728 is about 1925.5706389887.

The spelling of 7139673728 in words is "seven billion, one hundred thirty-nine million, six hundred seventy-three thousand, seven hundred twenty-eight".